Buoyant propeller



(No Model.)

G. H. POND. BUOYANT PROPELLER.

Patented July 20, 1897.

.To aZZ whom it may concern:

UNITED STATES PATENT OFFICE.

GOL DSBURY HARDEN POND, OF ASHBURNHAM, MASSACHUSETTS.

BUOYANT PROPELLER.

SPECIFICATION forming part of Letters Patent No. 586,915, dated July 20,1897. Application filed May 25, 1896. Serial No. 593,094. (No model.)

Be it knownthat I, GoLDsBURY HARDEN POND, a citizen of the UnitedStates, and a resident of Ashburnham, in the county of Worcester andState of Massachusetts, have invented certain new and usefulImprovements in Buoyant Propellers, of which the following is a full,clear, and exact specification.

My invention relates to improvements in buoyant propellers of that classor description for which I have made applications for Letters Patent ofeven date herewith, Serial Nos. 593,093 and 593,095.

The present invention relates more particularly to the means forpropelling the endless rails; and it consists, essentially, in anendless cable moving or traveling around two pulleys, in combinationwith buoyant pontoons hinged together, forming an endless series,flanged wheels j ournaled on transverse shafts secured to the pontoons,spring-clamps secured'to ends of said pontoons with which said cablesengage, and means for moving said cables, as will be hereinafter fullydescribed and claimed.

In the accompanying drawings, Figure 1 is acentral longitudinal sectionof a buoyant propeller constructed in accordance with my invention. Fig.2 is an elevation of one of the pontoons.

In the said drawings, the reference-letter B designates the lower deckof the structure, secured to suitable transverse beams 0.

- The letter A designates an endless rail com prising the upper andlower horizontal portions and the semicircular connecting portions.There are two of these rails .at each side of the structure arranged inpairs, but only one of them is illustrated in the present case.

cable 25, by which motion is imparted to said pulleys and horizontalcables. Secured to each end of the pontoons is a spring-clamp 24, withwhich the cables 22engage.

The operation is as follows: The steam-engine being set in operation thehorizontal cables 22 are set in motion, when the lower runs thereof willengage with the springclamps, which will grip the same. The endlessrails will now be caused to travel on the wheels of the pontoons, thelatter being successively depressed at the front and elevated at therear, forming ways for said rails.

Having thus fully described my invention, what I claim is- In a buoyantpropeller of the character described, the combination with the endlessrails, the pontoons hinged to each other and the wheels connectedtherewith, and the spring-clamps at the ends of the pontoons, of thepulleys, the endless horizontal cables, the lower runs of which engagewith and are gripped by said clamps and means for operating said cables,substantially as described.

GOLDSBURY HARDEN POND.

Witnesses:

H. M. POND, JOSEPH IsAAcs.

